Improvement in making chilled castings



UNITED STATES PATENT OFFICE.

WILLIAMv BUTLER, OF LITTLE FALLS, NEW YORK.

IMPROVEMENT IN MAKING CHILLED-CASTINGS.

Specification forming part of Letters Patent No. 14,44 2, dated March 18, 1856.

T0 all whom t may concern:

Be it known that I, WILLIAM BUTLER, of Little Falls, in the county of Herkimer and State of New York, have invented a neviT and useful Improvement in Boxes for Carriages and Vagons; and I do hereby declare that the following is a full and exact description.

To enable others to make and use my invention, I proceed to describe its construction and operation, reference being had to the drawings hereunto annexed and making part of this Specification. 1

Figure lis a side elevation of box, Fig. 2, box and cores; Fig. 3, chilled and sand cores; Fig. 4, end views ofthe box.

A is a box. B is asand core C No. 1 and C No. 2 are the hollow chill-cores. D D are the ends of the box. The box A is made of cast-iron. The inner surface of the box D D is chilled at each end by means of the chilled cores C N o. 1 and C N o. 2. The connection of the chill-cores G No. l and C No. 2 by the i sand core B is the important feature of my improvement. These combined chill-cores C No. l and C No. 2, with the sand core B, are so simple that any molder could make them, they being formed by placing the hollow chill-cores G No. l and C No. 2 at each end of the corebox a sufficient distance apart to form the chamber by means of the sand core .B. The sand core B is formed by forcing the sand through the hollow chill-cores C No. l and C No. 2 into the chamber, after which the cores aredried in the usual manner and set in the mold ready for casting.

By combining the chill-cores C No. l and C No. 2 with the sand core B the difficulty is obviated of warping and springing attending the chilling of boxes in the usual manner, as the box has a chance to shrink upon its center While being cooled, which could not be thecase if chilled through the entire inner surface ofthe box. Besides, 'a chamber is formed in the center chilled boxes on mandrels, which difficulty consists in removing the box from the mandrel before the shrinkage of the metal, which is not the case in the manner I cast them, the chills C No. 1 and C No. 2 being left in the boxes till the boxes are entirely cooled.

What I claim as my invention, and. desire to secure by Letters Patent, isg The combination of the hollow chill-cores C No. land O No.2 with the sand core B for the purposes of obviating the difficulty of warping and springing attending the casting of cast-iron boxes on chills, and therebyr forming a chamber in the box, in the Inanner and for the purposes Within described.

W. BUTLER.

In' presence of- GEORGE P. WILoox, SANDY OA sLER. 

